Breakable vessel for sample storage

ABSTRACT

The present invention relates to a vessel for containing and storing a sample and subsequent easy access to individual specimens of the sample, in particular specimens of biological samples. One embodiment discloses a breakable multi-specimen storage vessel comprising a container comprising a lower end and an upper end, at least one end having an open end, the length of said container being continuously formed and provided with break portions at predetermined positions alongside thereof where said container is adapted to be broken into a plurality of specimens, each specimen having a first end provided with at least a part of a first fastening mechanism and a second end provided with at least a part of a second fastening mechanism, wherein the configuration of the first fastening mechanism is different from the configuration of the second fastening mechanism. The breakable storage vessel according to the present invention may be applied within cryogenic storage applications.

The present invention relates to a vessel for containing and storing asample and subsequent easy access to individual specimens of the sample,in particular specimens of biological samples. The breakable storagevessel according to the present invention may be applied withincryogenic storage applications.

BACKGROUND OF INVENTION

Biological samples, such as substances in solution, e.g. blood samples,water tests, and tissue samples such as fertilized embryos, can often beeffectively stabilized by freezing. The frozen fluid and/or sample willremain stable for extended periods of time as long as it is kept in thefrozen state. Frequently these samples are collected in relatively largequantities, or collective sample, but could be utilized in smallerquantities, or specimens e.g. for test purposes.

When a specimen is needed, it often requires thawing of the entirecollective sample to obtain the specimen currently needed, and thenrefreezing the remainder of the collective sample. However, frequentfreezing and thawing cycles are almost always detrimental to the oftenunstable ingredients in the collective sample.

One solution is to store the collective sample in multiple smallindividual vessels. Then, when a specimen is needed, the necessarynumber of individual vessels may be thawed to provide the specimenneeded without thawing and refreezing other individual samples of thecollective sample. However, separation and freezing in individualvessels is cumbersome and time consuming, requires a larger amount ofindividual vessels, and thus larger storage facilities. The chance ofconfusion and mix-up of the individual vessels is also present.

U.S. Pat. No. 6,383,453 discloses a multi-specimen storage vesselprovided with a number of equally distanced ring-shaped “notches” thatextend around the perimeter of the vessel to constitute breakpoints.External screw threads for closing each specimen with screw caps may beprovided on the ends of each specimen, i.e. surrounding the breakpoints.WO 2009/086829 discloses a breakable multi-specimen storage vesselcomprising a container provided with break portions at predeterminedpositions alongside whereby the container is adapted to be broken intoto a plurality of specimens. The vessel and a broken off specimen may beclosed by closure caps.

SUMMARY OF INVENTION

A problem with the breakable storage vessels known in the art is thatwhen a specimen containing a biological sample is broken off andsubsequently closed at each end with e.g. caps the biological sample isconsequently accessible from both sides of the specimen. This may causeunfavourable situations, e.g. if the bottom end of a specimen is openedby mistake leading to potential loss of the sample. This may be avoidedby the improved storage vessel of the present invention: A breakablemulti-specimen storage vessel comprising a container comprising a lowerend and an upper end, at least one end having an open end, the length ofsaid container being continuously formed and provided with breakportions at predetermined positions alongside thereof where saidcontainer is adapted to be broken into a plurality of specimens, eachspecimen having a first end provided with at least a part of a firstfastening mechanism and a second end provided with at least a part of asecond fastening mechanism, wherein the configuration of the firstfastening mechanism is different from the configuration of the secondfastening mechanism.

The present invention further relates to a method for closing and safelyreopening a storage container comprising at least two open ends, whereina first end is provided with at least a part of a first fasteningmechanism and a second end is provided with at least a part of a secondfastening mechanism, and wherein the configuration of the firstfastening mechanism is adapted to be different from the configuration ofthe second fastening mechanism such that upon closing of the containeronly one of the first end and the second end can be easily reopened.

With different configurations of the fastening mechanism at each end ofa specimen the access to the content of the specimen is differentdepending on which end of the specimen is dealt with. This enables amore secure handling of biological samples because it can be ascertainedwhich end of the specimen will open.

DETAILED DESCRIPTION OF THE INVENTION

In the preferred embodiment of the invention the container has acircular cross section. However, other cross sections may be provided,such as an elliptical cross section polygonal cross section.

A fastening mechanism is a mechanism used to fasten two parts together.E.g. a screw thread is the fastening mechanism that enables that a screwbolt can join the matching nut.

In the preferred embodiment of the invention the storage vessel furthercomprises closure means adapted to close and/or seal the containerand/or one or more of said specimens. Preferably said closure meanscomprise or constitute the corresponding part of the second fasteningmechanism. By the “corresponding part” in the meaning of the attachmentpart, the receptor part, the fastener part, and/or the mating part ofthe first and/or the second fastening mechanism. Thus, preferably theclosure means is adapted to engage with the container and the ends ofeach specimen by means of the first and/or the second fasteningmechanisms. The closure means may for example be one or more caps.Preferably said closure means provides a liquid and air-tight sealbetween closure means and container/specimen.

It might be necessary to provide additional sealing to ensure a liquidand/or air-tight seal between the closure means and a specimen. Thus, ina further embodiment of the invention the closure means and/or the endsof a breakpoint are further provided with sealing means adapted to sealthe connection between the closure means and the container and/or one ormore of said specimens. Thus, the fastening mechanism provides thefastening and the sealing means provides the seal. In the preferredembodiment of the invention engagement of the fastening mechanismprovides “activation” of the sealing means, i.e. closing of thefastening mechanism results in a liquid and/or air-tight seal betweenthe closure means and a specimen due to the sealing means.

In one embodiment of the invention the sealing means is at least a partof a snap type connection, said snap type connection preferablycomprising a “plug” (male part) fitting into a “socket” (female part).Thus, each end of a specimen may comprise or constitute a male part ofsaid snap connection and where the corresponding female part of saidsnap connection is provided integral with the closure means. Thus, whenthe closure means is engaged with a specimen by means of the fasteningmechanism the snap type connection is engaged provided the sealing. Inorder to provide an even better sealing the sealing means may comprise amaterial that is softer than the material of (the rest of) the closuremeans. I.e. said sealing means may be at least partly provided in amaterial that is softer than the material of (the rest of) the closuremeans. E.g. the female part of the snap type connection may be at leastprovided in a material that is softer than the material of (the rest of)the closure means. The softer female part then provides an additionalsealing effect, like a lid provided with a rubber packing or gasket.

The storage vessel according to the invention, including the closuremeans, may be manufactured by means of injection moulding. A closuremeans comprising materials of different hardness, e.g. for the sealingmeans, may correspondingly be manufactured by means of multi componentinjection moulding.

In one embodiment of the invention said part of the first and/or secondfastening mechanism is provided on the outer surface of the first and/orsecond end of a specimen. Further, the configuration of the part of thefirst fastening mechanism provided on the first end of a specimen may bedifferent from the configuration of the part of the second fasteningmechanism provided on the second end of a specimen. The term“configuration” here in the meaning of any of the terms: layout, shape,outer shape, external form, exterior, design, construction andelaboration. Thus, the layout, shape, outer shape, external form,exterior, design, construction and/or elaboration of the part of thefirst fastening mechanism provided on the first end of a specimen may bedifferent from the layout, shape, outer shape, external form, exterior,design, construction and/or elaboration of the part of the secondfastening mechanism provided on the second end of a specimen. Thus, thedifference in configuration of the first and second fastening mechanismsmay be due to different fastening mechanism parts provided on thespecimens. Further, the part of the first fastening mechanism providedon the first end of a specimen and the part of the second fasteningmechanism provided on the second end of a specimen may be adapted tomatch the same receptor/attachment/fastener. Thus, even though thefastening mechanism parts provided on the specimens is configureddifferently they still fit the same receptor. I.e. the same closuremeans may be used for both ends of a specimen.

In one embodiment of the invention the first or the second fasteningmechanism is a locking mechanism. In this case a locking mechanism isunderstood as a fastening mechanism that locks, i.e. once the fasteningmechanism is closed it is very difficult to reopen. Thereby it may beensured that after closing a broken off specimen only one end of thespecimen is accessible, because only one end can be reopened/unlocked.

In a further embodiment of the embodiment of the invention the tensionof the first fastening mechanism is different from the tension of thesecond fastening mechanism.

Tension of a fastening mechanism is understood as the tensional powerneeded to close and/or release the fastening mechanism. Thus, withdifferent tension of the first and second fastening mechanisms it may beensured that one specific end of closed specimen is accessed.

In one embodiment of the invention the first and/or the second fasteningmechanism is a bayonet mount. A bayonet mount (or bayonet connector) isa fastening mechanism consisting of a male side with one or more pins,and a female receptor with matching L slots. The mount may be providedwith resilient means (such as a spring) to better keep the two partstogether. One of the advantages of a bayonet mount compared to e.g. ascrew threaded mount is that typically only half a revolution betweenthe two part is necessary to fasten the two parts together.

Preferably said part of said first and second fastening mechanismprovided on the first and second end of each specimen, respectively, isthe male side of a bayonet mount, i.e. one or more pins is provided ateach end of a specimen, preferably provided on the outer surface of thespecimen.

In one embodiment of the invention at least one pin of the bayonet mountis provided with a first protrusion. Preferably the pin(s) of thebayonet mount on one side of the specimen is provided with a firstprotrusion. The different pins provides for different configurations ofthe fastening mechanisms (bayonet mount) of the first and second side ofa specimen. Preferably the closure means comprise the female side of thecorresponding bayonet mount where the female part of the mount isprovided with a groove adapted to match the corresponding male pin and asecond protrusion in said groove adapted to engage with said firstprotrusion in the male part. Thus, both sides of the specimen arepreferably provided with the male part of a bayonet mount and both sidesof the specimen preferably match the closure means. However, the firstprotrusion at the pin(s) at one side of the specimen is adapted toengage with the second protrusion in the groove in the female part ofthe bayonet mount provided in the closure means. And when a bayonetmount comprising a pin with a first protrusion and a female mount withmatching second protrusion groove is engaged the two protrusions engageto provide a locking effect. Thus, consequently one end of the specimenis substantially locked whereas the other end can be easily reopened.

A further advantage of a bayonet mount is that when the male part of thebayonet mount (i.e. the pins) is provided on the container the mount canbe isolated from the break portion area. I.e. if the break is providedalong the recesses there is a risk of minor rugged and fractured partsalong the break area. However, as the bayonet pins can be provided onthe outer surface of the container with a small distance to the recessesthe pins may be unaffected by a break.

In one embodiment of the invention the closure means is one or morecaps, preferably adapted to engage with the container and/or one or moreof said specimens. Further, at least one of said caps may be a snap cap.A snap fastener may be a circular lip under one disc that fits into agroove on the top of the other, holding them fast until a certain amountof force is applied. Snap fasteners are often used in children'sclothing, as they are relatively easy for children to use. The “snap”closing may be combined with the fastening mechanism to provide a bettersealing.

In a further embodiment of the invention at least one of said caps isprovided with an internal curving bottom. Further, the material of thecap may be softer than the material of the container or the material ofthe cap is harder than the material of the container.

In a preferred embodiment, the container is adapted to be broken into toa plurality of specimens by application of a radially directed force,however other breaking means may also be used, such as breaking bytwisting, bending or combinations of the mentioned breaking means. Thecontainer includes the possibility of one or more, e.g. multiple breakportions at which the container can be divided along with its contentsinto one or more specimens, comprising one or more break portions. Theremaining samples can be stored or transported for processing or testingwithout having to be thawed and refrozen. In an embodiment of thestorage vessel, said break portions are provided as a one or morering-shaped external recesses extending around the perimeter of saidtubular container. Thus, the break portions are easy to produce, e.g. bymoulding, milling, etching or cutting, easy to break cleanly intospecimens, and easy to place in relation to a break operation. The depthof said recesses may be ranging from 50% to 95%, preferably from 70% to95%, more preferably from 80% to 90% of the total wall thickness of saidcontainer.

The internal surface of said container is preferably smooth, wheresmooth is defined as the inner surface of the container being providedwithout recesses and/or projecting parts outside production tolerances.By the provision of a substantially smooth inner surface, both in alongitudinal direction and going round the inside the container ingeneral does not require any further processing other than being mouldedand/or blown. Thus, the production process is eased and the productioncosts are reduced. By reducing the production costs of each individualvessel it may indeed also enable cost effective mass production thereof.The container is made of any suitable method, such as moulding orextrusion. Further, the container is easy to empty, clean, and dryduring use. In general, the container is provided as a disposabledevice, but one or more parts thereof may be suitable for reuse,depending on application. It has by the invention been realized, thatany size, length and diameter, and section shape, such as circular,triangular, square, hexagon or other polygon, may be broken off whenprovided as a container vessel according to the invention.

In a further embodiment of the invention the storage vessel comprisesidentification marks, such as arrows, for indicating the differentconfigurations of the fastening mechanisms. Further, identificationmarks, such as arrows, may be provided on each specimen for indicatingthe different configuration of the fastening mechanisms.

In an embodiment of the storage vessel, two or more of said externalrecesses are provided equally distanced with a distance D, whichdistance range from between 1 to 100%, preferably from between 10 to50%, more preferably from 33 to 40% of the entire length of thecontainer. Thus, different size specimens may be broken off. It may bean advantage to place the recesses farther apart for providing a largevolume of sample. However, it may on the other hand be more suitable toprovide the recesses close together, e.g. 1-5 mm in between, to providea wider selection of volumes to be broken off from the collectivesample. Alternatively, the individual recesses are positionedsequentially, but not with an equal distance apart, e.g. for specialapplications using an increasing distance, e.g. doubling the distance.

In an embodiment of the storage vessel the closure means provided withan internal curving bottom. This provide easy access e.g. for a syringeneedle in the bottom thereof, as the inner curving surface thus providesthe bottom of the specimen broken off.

In an embodiment of the storage vessel, the material of the closuremeans is softer than the material of the container. In another, thematerial of the closure means is harder than the material of thecontainer. Harder or softer is defined as the hardness during breakagetemperatures, such as cryogenic temperatures, wherein cryogenictemperatures is used in its conventional meaning, i.e. below −80° C.,such as below −150° C. This enables an easier attachment and detachmentof the closure means to/from the container. Alternatively, the twomaterials have the same hardness, and may also even be the samematerial.

In an embodiment of the storage vessel, the tubular container materialis a plastic material. Said plastic material may be selected from thegroup consisting of polyethylene and polypropylene. In anotherembodiment, the material of the tubular container is a glass material.These materials resist and conform well to cryo temperatures, resistchemical agents well, provide easy production thereof, and are non-toxicto the samples. Further, these materials provide a vessel, which is easyto break during freezing temperatures. Said storage vessel may be acryogenic storage vessel, but need not be, for example when the vesselis used for storing a fluid, which is fluid at room temperature, butsolid a temperatures around 5° C., such as stock for sauces, or when thefluid is crystalline at −3° C., but fluid above, such as water.

In general the storage vessel may be used for any material whichphysical state can change from one state, e.g. a liquid state, into asolid state, depending on the ambient conditions, such as temperatureand pressure. For instance, in one embodiment, the material is a gelhaving a phase transition from liquid to solid at a temperature greaterthan 0° C.

In an embodiment of the storage vessel, at least the surface of saidcontainer is provided with identification markings for identifying atleast the specimen taken, and/or identification markings for identifyingat least the vessel, the specimen is taken from. In another embodimentsaid identification markings also marks the volume within.

Thus, each individual specimen may be identified and traced to themother collective sample/vessel. Further, each individual vessel may beidentified, among several identical vessels. The volume is thenprecisely indicated and may be used for breaking off the desired lengthof specimen.

DESCRIPTION OF DRAWINGS

In the following the invention is described with reference to someembodiments shown in the accompanying schematic drawings, in which:

FIG. 1 is a perspective illustration of a breakable multi-specimenstorage vessel according one embodiment of the invention;

FIG. 2 shows top-view and side view schematic drawings of the breakablemulti-specimen storage vessel of FIG. 1,

FIG. 3 is a perspective illustration of a broken off specimen of thestorage vessel of FIG. 1 illustrated with matching closure caps,

FIG. 4 is the illustration from FIG. 3 with close-ups of the fasteningmechanism,

FIGS. 5 a-b are schematic illustrations of the cross section of the twoends of the specimen in FIG. 3,

FIG. 6 is a cut-through perspective illustration of the specimen in FIG.3 with engaging closure caps, and

FIGS. 7 a-b are detailed schematic illustrations of a break point of oneembodiment of the storage vessel according to the invention.

DETAILED DESCRIPTION OF THE DRAWINGS

The following is with reference to all FIGS. 1-7 showing an exemplaryand realized embodiment of the invention. The figures show how thegeneral idea of the invention, i.e. having (parts of) fasteningmechanisms with different configurations at the ends of a storagecontainer, may be implemented by means of a bayonet mount. However, thepresent invention could also be realized by other types of fasteningmechanisms, such as traditional threaded screw mounts.

FIG. 1 shows at least a part of a breakable multi-specimen storagevessel according to a first embodiment of the invention, suitable forcontaining a collective sample of e.g. a biological fluid sample ande.g. storing this at cryogenic temperatures. It is noted, that thevessel may be suitable for use in other applications, for examplestoring household or industrial cooking stock, as the vessel is used forstoring a fluid, which is fluid at room temperature, but solid atemperatures around 5 degrees C., or for storing water bound samples,where the fluid is crystalline at −3 degrees C., but fluid above.Further, the samples kept within the vessel may be non-fluid and/ornon-biological, as well, depending on application.

The storage vessel comprises a cylindrical longitudinally extendingtubular container 2 having a container bottom 22 at a closed lowerproximal end thereof and an open end 24. The container 2 in FIG. 1 isprovided with four externally provided ring-shaped break portions 4 on aperimeter thereof which provides the possibility of breaking off fivespecimens in total from the vessel comprising the collective sample. Thebreak portions 4 are formed as ring-shaped cuts or recesses extendingapproximately partly through the thickness of the wall material of thecylindrical tubular container 2. The plurality of break portions 4 isformed along the length of the container 2 between the bottom end 22 andthe open top end 24. The break portions 4 separate the multi-specimencontainer 2 into individual specimens, which by breaking can beseparated from the remainder of the collective sample as needed. Thecontainer wall interior opposite the break portions 4 have alongitudinally plane, smooth surface in order to provide as large aninterior volume as possible and for facilitating a low-cost productionthereof. By the term smooth is meant that the surface is providedsubstantially without recesses and/or projecting parts outsideproduction tolerances, such as less than a few hundredth to less than afew thousandth of the wall thickness. The break portions 4 are designedto facilitate breakage of the container 2 at the break portions 4, sincethey constitute reduced wall thickness areas of the container 2.

Further, said container 2 is provided with parts 5, 5′ of a fasteningmechanism, in the illustrated embodiment in FIGS. 1-7 the parts 5, 5′are the male parts of bayonet mounts. The configuration of the parts 5,5′ of the fastening mechanism provided on the storage container 2 variesalong the length of the container 2. This is seen by the differentconfigurations of the pins 5, 5′. FIG. 3 shows the specimen 9 isolatedfrom the container 2. One end of the specimen 9 is provided with pin 5and the opposite end is provided with pin 5′. Pin 5′ is provided with aprotrusion 8 whereas the surface of pin 5 is substantially flat. This isbetter illustrated in FIG. 4 which corresponds to FIG. 3 with close-upsof the pins 5, 5′ and in FIG. 5 showing end views of the specimen 9where the difference in cross-section of the pins 5, 5′ can be seen.Even though the pins 5, 5′ are different they match the same female partof a bayonet mount. The female part is provided in closure caps 3 andcan be seen in FIGS. 3, 4 and 6. The closure caps 3 are adapted toengage with the open end of the container 2 and with broken offspecimens from the container 2, e.g. the specimen 9 illustrated in FIGS.3 and 4 by means of the bayonet mount. The female part of the bayonetmount in the closure cap 3 comprises a groove 6 adapted to both pins 5,5′. A closure cap 3 is mounted by fitting the pins into the groove 6 andsubsequently rotating the closure cap 3 and the specimen 9 (or container2) in relation to each other. The pins 5, 5′ then follow inside thegroove 6 to engage the specimen 9 and cap 3 in a closed configuration.However, in this closed configuration the protrusion 8 on the pin 5′engages with the protrusion 7 in the groove 6 and provides a lockingeffect of the cap. The locked configuration with the two engagedprotrusions 7, 8 aligned against each other is illustrated in FIG. 6. Aclosure cap 3 mounted on the opposite end of the specimen 9 with the pin5 (without protrusion) also provides a closed and tight configurationbetween the cap 3 and specimen 9. However, with the substantially planesurface of the pin 5 there is no locking effect and the cap 3 can bedetached. Thus, if a specimen 9 is provided with closure caps 3 at bothends and one cap is detached by holding the other cap, the cap which ismounted on the end of the specimen 9 with the pin 5 is sure to openbecause the other cap is locked. When a specimen is closed by two capsit may be difficult to distinguish the different fastenings mechanism.However, by somehow indicating this difference on the surface of thespecimen 9 (e.g. by means of an arrow or a simple marking) a useraccessing a sample inside the specimen is sure to be able to keep thespecimen in the correct vertical orientation and concurrently open thecorrect cap.

FIG. 2 shows top-view and side view schematic illustrations of thebreakable multi-specimen storage vessel of FIG. 1 with a closure cap 3mounted on the open end 24. The interchanging pins 5, 5′ are illustratedalong the length of the container and it can also be seen that two pins5, 5′ are located opposite each other across a breakpoint 4 and pins areprovided for every 180 degrees round the perimeter of the container 2.Thus, four pins (two of type 5 and two of type 5′) are provided adjacentto each breakpoint 4.

As seen from FIGS. 3, 4 and 6 the cap 3 may be provided withindentations on the outer surface to provide a better grip when mountingand detaching the cap.

FIG. 5 provides a side view of a specimen 9 where the pins are providedopposite each other across the diameter of the specimen 9, i.e.separated by 180 degrees around the circumference of the specimen. Thepins 5′ in FIG. 5 a are provided with a protrusion 8 whereas the pins inFIG. 5 b are provided with a protrusion. The values on FIGS. 5 a and 5 bare the diameter in mm of the specimen measured from the outer surfaceof the pins, i.e. the diameter from the surface of one pin 5 to theopposite pin is 12.4 mm whereas the diameter from the top of theprotrusion 8 to the opposite protrusion is 13.0 mm. Thus, the maximalheight of the protrusion 8 is 0.3 mm in this case. The inner and outerdiameter of the storage container and (thereby a specimen) is 9 mm and11 mm, respectively, in this example and the height of a pin 5, 5′ isthus 0.7 mm. The corresponding cap 3 has an outer diameter of 14.8 mmand a height of 6.4 mm.

FIG. 7 provides a close-up view of a break-point 4. FIG. 7 a is sectionof the storage container across a break point 4. Pins 5, 5′ are visibleand they are located adjacent the break point 4, however separated fromthe actual break portion area. One of the pins 5′ comprises a protrusion8. FIG. 7 b is a close-up cross section of the storage container wallacross a break point 4. The inner wall/surface 10 of the storagecontainer 2 (or specimen 9) is seen to be smooth across the break point4. Thus, the break point is constituted by varying the diameter of theouter wall/surface 12 of the container. In this case the thickness ofthe container wall is 1 mm. At the break point the thickness of thecontainer is 0.15 mm, i.e. at the break point 4 the thickness of thewall is 15% of the container wall. This suffers to provide sufficientstrength and stability to the storage container, however at the sametime easing the breakage of the container into specimens along the breakpoints 4.

As seen from FIG. 7 b the contour of the outer surface of the containeracross the break point 4 resembles a “double dip” with a small “valley”13 followed by a top 12 before the large “valley” 4 constituting thebreak point 4. The top 12 and valley 13 are not necessary to provide thebreak point, however the top 12 and the valley 13 may help to ensure atight seal of the specimen when a cap 3 is attached, because the top 12constitutes a circular lip 12 that can fit into a corresponding circulargroove provided inside the cap 3 (this groove is not shown). Thelip-groove interlocking mechanism may thereby constitute a snap fastenerthat provides a liquid and air tight seal between the cap 3 and thespecimen 9. In this snap type connection the male part is provided onthe specimen whereas the female part is provided integral with the cap.The force necessary to “snap” the male and female part together comesfrom the rotational movement when mounting the cap 3. When rotating thecap 3 the pins 5, 5′ are steered inside the bayonet groove 6 whichresults in a force that contracts the cap 3 and the specimen 9. Thisforce draws the lip 12 into the corresponding groove and provides thesnap fastening and tight seal. A better seal may be provided if a partof the snap type connection is provided in a softer material, providingsubstantially the same effect as a soft (rubber) gasket or packing (likean o-ring) sealing a closure mechanism. If one part is softer the twopart of the snap type connection will better conform to each otherpossibly resulting in a more tight seal. The soft part maypreferentially be provided in the female part of the snap connection,i.e. within the cap 3.

The distances between specimens may be selected appropriately duringproduction relative to the intended use, specimen volume, and userneeds. They may be of equal length ranging from between 1 to 100%,preferably from between 10 to 50%, more preferably from 33 to 40% of theentire length of the container 2. The length of a specimen may in manyuses correspond to 0.1-0.5 ml volume of sample within the container,depending of course on container diameter at hand, which in principlemay be any diameter at hand, but in practice, in particular when appliedto cryo tubes, often ranging from 1 mm to 50 mm in diameter. Any numberof break portions needed for any type of application is conceivable.Non-equally distanced break portions as shown in FIG. 1 are alsoconceivable, e.g. for special applications using increasing ordecreasing amounts of volume for each test-sample.

The bottom 22 of the container 2 gently curves inwards to form a roundedbottom such as semicircular, convex, cone shaped or pyramidal, in orderto provide space e.g. for housing a needle end. The container bottomwall in the container bottom 22 is extending beyond the outer surface ofthe bottom 22 in order to provide stability, if placed on a planesurface and the bottom 22 extending downwards.

In an alternative embodiment the storage container may be provided withboth ends open. Preferably a closure caps are then provided at each endthereof in order to provide a secure fit thereto, reduce spillage, andprovide stability standing on one end.

The storage vessel may be broken into two or more specimens during use.The container 2 is designed so that a radially directed gentle manual ormachine operated force will break the container 2 along one of the breakportions 4. Further, the container 2 is designed such that when thecontainer 2 is divided in a manner that leaves both the lower part andthe upper part with a new open end, see FIG. 3, two caps 3 can beattached to these open ends of the container 2.

In FIG. 3 is shown a specimen 9 from the storage vessel of FIG. 1. Abiological sample is not known within the storage vessel 1 and specimen9. However, it may advantageously be used for storing a fluid biologicalcollective sample (not shown) filling out substantially the entireinside volume of the container 2. Further, the vessel comprising thecollective sample may preferably be frozen, e.g. for cryogenic use, inorder to provide a clean break surface when a specimen is broken off.When broken in a frozen condition, each broken off part will ideallycontain frozen specimens, where the exposed surface thereof lies in asubstantially flat planar perpendicular relationship to the outer wallsurface of the container 2.

The depth of a recess of a break portion 4 is preferably selectedrelative to the hardness of the material of the container 2 in such away that both safe storage and handling, and an easy break operation isachieved. The depth of a recess may range between from 5 to 95%,preferably from 50 to 95%, more preferably from 75% to 95% of the totalwall thickness of the tubular container 2, depending on containermaterial selected. A remaining wall thickness of 5 to 25% is sufficientfor maintaining container stability and securing handling. The shape ofthe recesses may be v-shape, u-shape, 1-shape or any other appropriateshape, and/or may differ or be of uniform shape along the container 2.

An outer surface of at least part of said container 2 or specimen 9 mayfurther include information such as markings identifying at least thespecimen 9 taken, and/or identifying which vessel said specimen has beentaken from, e.g. a three to five digit (number, letter, symbol) code orcodes in sequence extending peripherally and/or longitudinally along thelongitudinal side thereof or the like. When being delivered in acollection of 100 to 1000 pieces of such storage vessels, the sequenceof digits is preferably selected in such batch as not to result in anyduplicate digit combination thereon. Thus, the risk of mix-up betweenspecimens broken off and the remainder of the vessel before labellingthereof has been performed may be reduced, as it could happen in thecase of dropping or misplacing one or more of said specimens.

Further, at least part of an outer container 2 surface and/or outer cap3 surface may be provided with volume indication markings of the volumewithin, in sequence or using simple perimeter line markings, as is knownto the skilled person. They may correspond to relatively small volumes,such as 0.1 ml each or larger volumes, such as from 0.1 ml up to 1 dl,depending on length and diameter of the container being used.

Further, the vessel may be provided with further info, such astrademarks, producer name, and the like. The markings may include aplanar longitudinally extending section for providing an adhesive IDlabel or barcode e.g. for individual specimen identification, dateand/or user initials. The different types of markings may for examplecomprise written information, a number, barcode, and/or sign indicationsequence, or any combination thereof, also stating production info,producer ID, and may be provided by labelling, moulding, etching,cutting or milling.

Further, the cap form, i.e. diameter and design of sides fits snuglywith the wall of the container in such a way that an easy fastening onof the cap is provided, and such that a secure tightening is allowed,for a secure fit of the cap to the container. One or more of the caps 3may preferably be supplied together with one or more of said containers2 to constitute a storage vessel according to the invention.

The storage vessel, e.g. the tubular container 2 and one or more caps 3,should all be made of materials which can withstand deep freezingtemperatures and which have got reduced resistance against radialbreakage at least deep frozen. In general, a chemical resistant materialis preferred, where some preferred materials include plastic materialssuch as polypropylene (PP), polyethylene (PEHD), polystyrene, orpolycarbonate, but some glass materials resistive to temperaturevariances may also come into use. The caps and/or the container mayfurther comprise rubber or plastic gaskets suitable for sealing duringcryogenic temperatures.

The material used for the tubular container 2 may preferably chosen asto be easily mouldable and/or workable for providing break portions,such as cuts and/or threads therein, which are both durable duringstorage and handling, and easily breakable during dividing. The materialmay then preferably be chosen as polypropylene, because this materialhas increased brittleness during freezing temperatures.

Further, in order to provide excellent security against spillages, thecap 3, at least in room temperatures, may be of a more or less resilientand/or more or less hard material than the container 2, or vice versa.The material of the cap 3 may be softer than the material of thecontainer 2 at room temperature and/or during breakage temperature, suchas cryogenic temperatures, i.e. around −70° C., or even highertemperatures, e.g. around 0° C., or higher yet. Further, the material ofthe cap 3 may be harder than the material of the container 2 at roomtemperature and/or during freezing temperature. That is to say that thehardness of the material of the cap 3 and/or container 2 may be chosenas to ease the application and detachment of the cap 3 from thecontainer 2, while at the same time provide a secure fit therebetween.

In order to increase readability of the volume or ID markings upon thecontainer 2, the cap 3 or caps may be provided in a transparentmaterial.

The container may be produced by moulding, e.g. blow or injectionmoulding or the like, as is known to the skilled person, and differentelements of the container, such as the threads, the markings, therecesses and/or the side extensions my be provided at the same time ormachined after moulding. If more than one material is needed, e.g. twomaterials of different hardness, multi component injection moulding is agood choice.

The break portions 4 of the container 2 may be specifically indicated,e.g. using peripheral colour line markings, metal or magnetic bandmarking, e.g. for use in further processing, or the like, for a furthervisual indication of the position of the break portion. A storage vesselaccording to the invention is designed to be broken off into specimensusing a manual break operation, but may also broken using a break tool,in which case, the risk of breakage in a wrong position or damage to thecontainer is decreased. Examples of such possible break tools will bedescribed below are described in WO 2009/086829 by the same inventors.

During use, the cap 3 is applied, for example during a frozen state bymounting the cap 3. Then the cap 3 and container 2 is held by the userin each hand and broken into two parts by using the necessary breakforce. Other alternatives are conceivable, for example a break tool isheld fixed against a surface, such as a table or a wall, and the userbreaks the specimen off using manually applied force, or the breakingoff is performed automatically or manually using a force providingmeans, such as a motor operated winch, pawl or pin (not shown).

1. A breakable multi-specimen storage vessel comprising a container comprising a lower end and an upper end, at least one end having an open end, the length of said container being continuously formed and provided with break portions at predetermined positions alongside thereof where said container is adapted to be broken into a plurality of specimens, each specimen having a first end provided with at least a part of a first fastening mechanism and a second end provided with at least a part of a second fastening mechanism, wherein the configuration of the first fastening mechanism is different from the configuration of the second fastening mechanism.
 2. The storage vessel according to claim 1, wherein the container has a circular or elliptical cross section.
 3. The storage vessel according to any of the preceding claims, wherein the first or the second fastening mechanism is a locking mechanism.
 4. The storage vessel according to any of the preceding claims, wherein the tension of the first fastening mechanism is different from the tension of the second fastening mechanism.
 5. The storage vessel according to any of the preceding claims, wherein the tension necessary to release the first fastening mechanism is different from the tension necessary to release the second fastening mechanism.
 6. The storage vessel according to any of the preceding claims, further comprising closure means adapted to close the container and/or one or more of said specimens.
 7. The storage vessel according to claim 6, wherein said closure means comprise or constitute the corresponding part of the first and/or the second fastening mechanism.
 8. The storage vessel according to any of claims 6 to 7, wherein said closure means and/or the ends of a breakpoint are further provided with sealing means adapted to seal the connection between the closure means and the container and/or one or more of said specimens.
 9. The storage vessel according to claim 8, wherein said sealing means is at least a part of a snap type connection, said snap type connection preferably comprising a “plug” (male part) fitting into a “socket” (female part).
 10. The storage vessel according to claim 9, wherein each end of a specimen comprise or constitute a male part of said snap connection and where the corresponding female part of said snap connection is provided integral with the closure means.
 11. The storage vessel according to any of claims 8 to 10, wherein said sealing means comprise a material that is softer than the material of (the rest of) the closure means.
 12. The storage vessel according to any of claims 8 to 11, wherein said sealing means is at least partly provided in a material that is softer than the material of (the rest of) the closure means.
 13. The storage vessel according to any of claims 9 to 12, wherein the female part of the snap type connection is at least provided in a material that is softer than the material of (the rest of) the closure means.
 14. The storage vessel according to any of the preceding claims, wherein the part of the first and/or second fastening mechanism provided on the ends of a specimen is provided on the outer surface of said specimen.
 15. The storage vessel according to any of the preceding claims, wherein the configuration of the part of the first fastening mechanism provided on the first end of a specimen is different from the configuration of the part of the second fastening mechanism provided on the second end of a specimen.
 16. The storage vessel according to any of the preceding claims, wherein the part of the first fastening mechanism provided on the first end of a specimen and the part of the second fastening mechanism provided on the second end of a specimen are adapted to match the same receptor/attachment/fastener.
 17. The storage vessel according to any of the preceding claims, wherein the first and/or the second fastening mechanism is a bayonet mount.
 18. The storage vessel according to any of the preceding claims, wherein said part of said first and second fastening mechanism provided on the first and second end of each specimen, respectively, is the male side of a bayonet mount.
 19. The storage vessel according to claim 18, wherein at least one pin of the bayonet mount is provided with a first protrusion.
 20. The storage vessel according to claim 19, wherein the closure means comprise the female side of the corresponding bayonet mount, said female part comprising a groove adapted to match the corresponding male side and a second protrusion in said groove adapted to engage with said first protrusion in the male part.
 21. The storage vessel according to any of the preceding claims 6 to 20, wherein the closure means is one or more caps adapted to engage with the container and/or one or more of said specimens.
 22. The storage vessel according to claim 21, wherein at least one of said caps is a snap cap.
 23. The storage vessel according to any of claims 21 to 22, wherein at least one of said caps is provided with an internal curving bottom.
 24. The storage vessel according to any of claims 21 to 23, wherein the material of the cap is softer than the material of the container or the material of the cap is harder than the material of the container.
 25. The storage vessel according to any of preceding claims, wherein the depth of said recesses is ranging from 50% to 95%, preferably from 70% to 95%, more preferably from 80% to 90% of the total wall thickness of said container.
 26. The storage vessel according to any of preceding claims, wherein the container is adapted to be broken into to a plurality of specimens upon application of a radially directed force.
 27. The storage vessel according to any of preceding claims, wherein said break portions are provided as one or more ring-shaped external recesses extending around the perimeter of said container,
 28. The storage vessel according to any of preceding claims, wherein the internal surface of said container is smooth.
 29. The storage vessel according to any of preceding claims, wherein the container material and/or the cap material is a plastic material, such as polyethylene or polypropylene, or a glass material.
 30. The storage vessel according to any of the preceding claims, further comprising identification marks, such as arrows, for indicating the different fastening mechanisms.
 31. The storage vessel according to any of the preceding claims, further comprising identification marks, such as arrows, on each specimen for indicating the different fastening mechanisms.
 32. The storage vessel according to any of the preceding claims, wherein said storage vessel is a cryogenic storage vessel.
 33. A method for closing and safely reopening a storage container comprising at least two open ends, wherein a first end is provided with at least a part of a first fastening mechanism and a second end is provided with at least a part of a second fastening mechanism, and wherein the configuration of the first fastening mechanism is adapted to be different from the configuration of the second fastening mechanism such that upon closing of the container only one of the first end and the second end can be easily reopened.
 34. The method according to claim 33, wherein the storage container and the first and second fastening mechanisms comprise the features of any of claims 1 to
 32. 